What are Templates?
Templates are account-wide menus that can be used across multiple locations. Templates are useful to mainline change management across multiple locations.
Any changes made to a Template will impact every location actively using the Template, giving you the ability to have consistent menus across multiple storefronts without needing to make the changes more than once.
A full article explaining how to create Templates can be found here
Templates Tab > Digital/Print/Web > Template Collections